Fire-extinguishing apparatus.



W. W. WALKER.

FIREI EXTINGUISHING APPARATUS.

V APPLICATION FIL'ED AUGJI. l9l6. A 1,259,813; Patented 19,1918.v

' a4/Ma; ma

- UNITED STATE-s PATENT oFFIcE.

WILLIAM W. WALKER, 0F CAMDEN, NEW JERSEY, ASSIGNOR TO MAoANDREWS & FORBES COMPANY, OF CAMDEN, NEW JERSEY, A CORPORATION 0F NEW JERSEY.

rma-EXTINGUISHING APPARATUS.

Y Specification of Letters Patent.

Patented Mar. 19, 191s.

To all'fwhom'z't may concern:

Be. it known that WILLIAM W. WALKER,

a citizen of the United States, residing at Camden, in the county of Camden and State of New Jersey, has invented certain new and useful Improvements in Fire-Extinguishing Apparatus, ofwhich the following is a speciication. 7

This invention relates to re extinguishers and-is in the nature of an improvement on the apparatus forming the subject matter of my' earlier Patent 1,186,248, dated July 6', 1916.

In the present instance it is my purpose to provide a fire extinguishing apparatus embodying a pair of spaced containers wherein e two chemicals or solutions arestored and maintained separate from each other Awhen the apparatus-is not in use, these chemicals or'solutions being mixed by inverting the apparatus when it is'desired to extinguish a fire, the'mixing of the chemicals-or solutions resulting in the generation of a foam'and gas which is noxious to the flame.

A further object of the invention is' the provision of an apparatus of this class which is so constructed as tofobviate the liability of the chemicals or solutionsleaking out or ratus isjnot in use.

I also ropose to .provide a fire extinguisher w erein the fire extinguishing foam and gas may befre'a'dily conducted'from the container to a discharge pipe and` thence.

vprojected on'to the fire without actually dis# ghapging anyof the liquid itself upon'such r i an apparatus embodying m invention, cer` Pliovisioa of `fireesti.riguisliina apparatussimplicity, etBciency, yand, convenience, and which may be manufacturedandmarketed at a relat'ivel low cost; r i i With the a ove recited' objects gandvothers of'a si'nilar'nature in view, invention consists in the -construction, combination and arrangement lof parts set forth and falling within the scope of the appended claims.

In the accompanying drawings Figure 1 is a sectionalviewtaken through tain parts being shown in e evation.

Fig. .-2 is a cross sectional view taken on Another,lobject of;l the invention -is'the .seriesof s aced guide the line 2 2 of Fig. 1 and looking in the direction of the arrows.

Referring now lto the accompanying drawy or cylindrical in form and is provided with a dished bottom 2 brazed or otherwise permanently secured as at 3, to the base 4 of the Y container. The upper end of this container is provided with a dome 5 having its-lower edge formed with a circumferential bead 6 .which interlocks vwith a similar bead 7 at the 'upper end of the cylinder 1. Brazed or otherwise secured to the inner face of this cylinder 1, at the upper end thereof is a ring 8 which at its upper end forms a tight joint with the dome 5 when the latteris assembled on .the cylinder 1. To provide means for attaching the outer cover '9 with the dome I prefer to employ a thimble 10 having its lower portion terminating in the curved fiange 11, which is brazed to the inner face 0f the upper portion of the dome as at 12. The neck 13 of this thimble is threaded as at 14 to receive the correspondingly threaded neck 15 of the main cover 9, a gas-I ket 16 being preferably interposed between the top edge of the thimble neckand the cover to form a tight joint.

. The numeral 17 designates the inner container of the apparatus which is also in the.

nature of a cylindrical or tubular shell.

They lower end 'of this entainer 17. is connected with the bottom2 b means of ya resilient flanged# struck up rom the metal of such bottom By means of thisliange fthefinner container which it normall closes and thereby permit the liquid inl t e container to flow through the end thus o ene.

In orderto guide this cap tow'ard an from' the end of thel container on which ,it Beats I refer to employ a y and which it closes,

ars 20, the u per the in ner container is stationarily supported I; --within and in spaced relation to the cylindrgalpwalltof the outer container. The top ends of which are secured to the thimb e'as bent inward and. secured to the adjacent at 21, while the lower ends ofthese barsfare end portion of the inner container as shown at 22.

When not in use the fire extinguisher is intended to stand upright or in the position in Fig. 1, withA the inner container holding a solution A, and the outer container holding a solution shown at B. These two solutions preferably have substantially the following composition:

Solution No. A.

sodium 10i-Carbonate s parte. Water 89 Foamite (secondary extract of licorice root) 3 Solution No. B. Aluminum sulfate 11 parts. Water. 89

The function of the licorice root extract is to produce foam when the two solutions are brought together and this foam of course deters the escape of the gases generated by the mixture, which are principallyl carbon dioxid, and hence when this foam is thrown upon the fire, it excludes the air by forming a blanket of foam, and consequently extinguishes the fire.

It will of course be evidenty that when it is desired to use the extinguisher, asin case of a re, the apparatus is inverted, and this act of inversion will cause the loosely fitting, weighted cover 19 to drop or fall from the end of the inner container so that the two solutions will come together and mix in the dome section of the apparatus.

This will result in the generation of con siderable gas consisting principally of carbon dioxid (CO2) and above the surface of the\mixed liquids or in the bottomsection of the apparatus, which is now uppermost, there is generated a large quantity of foam. The gas isgenerated so rapidly and there is such a quantity of foam also generated that the gas and foam escape at a high velocity from the apparatus. .In orderto conduct tlie'" gas and foam from the containers I provide a suitable flexible discharge pipe or hose 23 having at its free end a suitable nozzle 24 While the opposite end/of this hose is connected by a threaded union or coupling 25 with the elbow 26,'the latter` Vprojecting through the dome of the appa;

inverted the discharge hose 23 with its noz' zle 24 will hang down in such position as to'enable the gas and foam generated by the mixture of the solution to How through these pipes 31 and 32 into and through thisdischarge pipe 23 so that such gas and foam may be projected upon the fire.

If desired, instead of employing two pipes 31 and 32, that is one for each container, I may omit one of said pipes, preferably the inner pipe 32, and use the pipe 31 as the means for conducting the foam and gas from the highest portions of the inverted apparatus to the hose 23. In order to obviate the possibility of the chemicals or solutions being forced out of the containers and into the hose 23 by compression, I provide the small orifice or bleed opening 28 which` while large enough to allow the air to escape will be too small to have any appreciable injurious effect on the action of the extinguisher. By employing two pipes 31 and 32, one for each container, I insure that foam and gaswill be conducted from the inner container as well as the vouter container, but as above mentioned, I may, if desired, employ but one of these pipe sections.

One distinct advantage incident to this" invention is that when the apparatus is in its normal upright position, as shown in Fig. 1, the discharge hose 23 may, hang down along side .the outer container, yet no solution can` escape therethrough, as the point of connection of the hose with the pipe or pipes leading from `the containers 1s, in the upright positionoft-tliecontainer,

'above the llevel of the solutions.

`Furthermore this discharge hose 23 is, as usu'al, composed of rubber or a composition of rubber and fabric and as I connect the hese' with the dome section of the apparatus instead of withthe bottom section thereof, I obviate the objection of having any part of the solution or solutions remain standing in the hose when the apparatus is not in use. This construction also enables me to avoid the use of clips and similar fastening devices which are necessary to hold the nozvzle endofthe hose-in .an upright position whensuch hose is connected with the bottom of the apparatus, and consequently I insure against the escape of the contents from the v apparatus which might result from.- accidental disengagement of the hose and dropping down of the-same from such clips.

While I have herein shown and described one particular embodiment of my invention I wish it to be understood that I do not confine myself to all the precise details of construction herein set forth by way of illustration as modification and variation may be made without departing from the spirit of the invention or exceeding the scope of the appended claims.

What I claim is- 1. A re extinguisher comprising an outer container and an inner container spaced apart from the outer container, both adapted to hold solutions to be mixed, a pipe projecting through the top portion of the outer container and extending longitudinally within the latter and terminating in an open end adjacent to' the bottom of said container, said pipe having a connection container and terminating in an open endadjacent to the bottom of the outer container, a hose connected with the upper end of said pipe and normally adapted to hang downward alongside of the outer container, and a second pipe connected with the first mentioned pipe and projecting through the upper portion of the inner container and extending longitudinally of said inner container and terminating in an open `end adjacent to the bottom of said-inner container.

3. fire extinguisher comprising an outer container and an inner container spaced apart ltherefrom and both adaptedl to hold solutions to be mixed, a closure for the outer container, and a closure for the inner container communicating pipes for the two containers, one of said conducting pipes terminating in a section projecting through the cover of the outer container, and a discharge hose connected to said projecting section.

4f.. A re extinguisher comprising an outer container having a bottom formed with a flange and a dome constituting the top of the container, an inner container spaced apart from the Vouter container and gaged at its lower end by the flange at the bottom, a loose displaceable cover for the inner container, a pipe extending longitudinally of the inner container from a point adjacent the bottom to a point adjacent the top thereof, a second pipe .within the outer container extending from a point adjacent to the bottom of the outer container to a point adjacent to the top thereof, a connection between the two pipes, an angular pipe sec- .j

tion connected with the upper portion of the pipe of the outer container and projecting through the dome, such angular pipe of said angular pipe section and adapted to be suspended therefrom when the apparatus is in its normal upright position.

Intestimony whereof I aifix iny signature in the presence of two witnesses.

WILLIAM W. WALKER.

Witnesses:

FRANK J. MAGINNIS, ANDREW KETER. 

